About Date Duration Calculator
A focused website for one practical task.
Purpose
Compare calendar dates without time-of-day or daylight-saving effects. The result is elapsed days, not a legal or business-day count.
The tool is intended to work without accounts. In this starter version, calculations run in the browser and there is no form-submission backend.
Accuracy and limitations
Legal, billing, and contract deadlines can use special counting rules. Do not rely on this for a legal deadline.
Formulas and assumptions are shown so visitors can review the result; no particular outcome is guaranteed.